Graphene flame-retardant glove and preparation method thereof

Abstract

The invention discloses a graphene flame-retardant glove and a preparation method thereof, and relates to the field of glove manufacturing, and aims to solve the glove manufacturing problem, the key points of the technical scheme are as follows: the interior of a glove body is coated with a thermal insulation layer, the glove body is made of a modified polyamide 66 material, the thermal insulation layer is made of an aerogel nanofiber felt material, and the thermal insulation layer is made of an aerogel nanofiber felt material. The bonding layer is fixedly arranged between the glove body and the heat insulation layer, the silk lining covering the heat insulation layer is fixedly arranged in the glove body, and the graphite flame-retardant glove has the flame-retardant function and the heat insulation function and is not prone to hurting the hands of people during high-temperature work.

Description

Technical Field

[0001] The present invention relates to the technical field of glove manufacturing, and in particular to a graphene flame-retardant glove and a preparation method thereof. Background Art

[0002] Flame retardant fireproof gloves are also called high temperature resistant gloves, heat insulating gloves, anti-high temperature gloves, etc. They are special high temperature resistant gloves that can effectively prevent open flames from causing harm to users and have flame retardant and heat insulating properties. Fireproof gloves need to have excellent flame retardant, high temperature resistant, heat insulating and other properties. They are generally made of flame retardant and high temperature resistant materials and are suitable for use in environments exposed to open flames. Flame retardant refers to materials that can prevent combustion but are not easy to burn themselves. High temperature resistance means that an object will not undergo physical changes such as combustion and carbonization after contacting a specific high temperature. Heat insulation refers to the physical process in which the temperature change per unit space becomes smaller due to the change in the conduction medium when heat is transferred from a higher temperature space to a lower temperature space during the heat transfer process, thereby blocking heat conduction. These all put forward very high requirements on the materials of flame retardant gloves.

[0003] Graphene is a single-layer carbon atom material peeled off from graphite. It is a single-layer two-dimensional honeycomb lattice structure composed of carbon atoms tightly stacked. It has excellent mechanical, optical and electrical properties and a very stable structure. At the same time, graphene also has a certain synergistic flame retardant effect. The existing patent number is 202211607462.0, which is a graphene flame retardant glove and its preparation method. The modified graphene polyester flame retardant composite fiber is woven into flame retardant gloves by knitting.

[0004] The above-mentioned prior art solutions have the following defects: knitted gloves have a large number of weaving holes without any filling blocks, and the heat insulation of pure knitted gloves is poor. They can be flame-retardant when exposed to open flames or high temperatures, but they are still very easy to burn the palms. Summary of the invention

[0005] The object of the present invention is to provide a graphene flame retardant glove and a preparation method thereof.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The invention comprises a glove body, wherein the interior of the glove body is coated with a heat insulating layer, the glove body is made of modified polyamide 66, the heat insulating layer is made of aerogel nanofiber felt, a bonding layer is fixedly arranged between the glove body and the heat insulating layer, and a silk lining covering the heat insulating layer is fixedly arranged inside the glove body.

[0008] By adopting the above technical solution, the additional insulation layer is made of aerogel nanofiber felt, which is a nano-scale porous solid material. The pore size in the aerogel material is generally concentrated at 50nm. The air molecules in the pores lose the ability to flow freely if the mean free path of air molecules is less than 70nm, and heat transfer cannot be achieved through thermal convection. Heat conduction uses the thermal conductivity of solids to conduct heat away. The multi-nanoporous structure in the aerogel allows heat flow to be transferred only along the pore wall when it is transferred in the solid, and the formed heat conduction path is very long. Thermal radiation transfers heat by absorbing electromagnetic radiation waves. The inside of the material acts as a heat shield for each pore wall, thereby reducing radiation heat transfer to almost the minimum limit. Together, they almost block all heat transfer pathways. Therefore, while having a relatively light density, they have an excellent thermal insulation effect. Graphite flame-retardant gloves have both flame-retardant and thermal insulation functions, and are not easy to injure people's hands when working at high temperatures.

[0009] Furthermore, a method for preparing graphene flame retardant gloves comprises the following preparation steps:

[0010] S1. Use polyamide 66 fiber to cut the fabric into a suitable shape;

[0011] S2, coating both sides of the fabric with a 10wt% graphene oxide solution, a radiation sensitizer and a 10wt% melamine solution;

[0012] S3, subjecting the treated sample to electron beam irradiation treatment in a nitrogen atmosphere to obtain a single-layer flame retardant fabric;

[0013] S4, coating a bonding layer on one side of a single-layer flame-retardant fabric;

[0014] S5, covering the aerogel nanofiber felt on the binding layer to obtain a flame retardant heat insulating fabric, standing for 45-48 hours until the fabric is firmly bonded, and then covering the aerogel nanofiber felt with a silk lining layer;

[0015] S6. Sew the flame-retardant heat-insulating fabric and the silk lining layer along the edges into the shape of gloves, then cut off the burrs and thread ends, turn the gloves inside out, and obtain a finished graphene flame-retardant glove with an aerogel nanofiber felt insulation layer.

[0016] Furthermore, the bonding layer is alumina high temperature resistant glue, and the radiation sensitizer is triallyl cyanurate.

[0017] Furthermore, the aerogel nanofiber felt comprises the following preparation steps:

[0018] A1. Prepare nanofiber aerogel by sol-gel method, weigh 100 parts of premixed reagents by weight, wherein the premixed reagents are aluminum nitrate, aluminum isopropoxide, tetraethyl orthosilicate, deionized water, and anhydrous ethanol in a molar ratio of 1:2.5:1.16:60:16, and continuously add anhydrous oxalic acid during stirring to adjust the pH value of the solution to 0.5-1, and stir evenly for 10h-12h;

[0019] A2, weigh 1-2 parts of spinning aid by weight and add it to the solution obtained in step A1, and continue stirring for 3-4 hours to obtain a spinning sol;

[0020] A3, using electrospinning technology, spinning nanofiber precursors under the conditions of DC voltage 30-35kv, pump speed 9-12rpm, spinneret speed 35-40cm / min, temperature 26-28 degrees Celsius, and humidity 32-34%;

[0021] A4, placing the nanofiber precursor obtained in A3 into a crucible for calcination to obtain nanofiber aerogel;

[0022] A5, weigh 80-90 parts of the nanofiber aerogel prepared in step A4, and fully immerse it in a silica sol solution with a concentration of 0.6-0.7wt%;

[0023] A6. Place the nanofiber aerogel soaked in silica sol solution into a liquid nitrogen quick freezer and freeze-dry for 30-35 hours;

[0024] A7. Place the freeze-dried nanofiber aerogel into a large crucible, calcine at high temperature, and press it into aerogel nanofiber felt material using a hot press.

[0025] Furthermore, the spinning aid is a polyethylene oxide aqueous solution with a mass fraction of 3%-5%, and the silica sol is prepared by mixing and stirring ethyl orthosilicate, anhydrous ethanol, deionized water and acetic acid in a mass ratio of 5:20:40:2.8 for 1-1.5 hours.

[0026] In summary, the beneficial technical effects of the present invention are:

[0027] 1. The flame-retardant heat-insulating fabric, alumina high-temperature resistant glue and silk lining are used to produce graphite flame-retardant gloves with both flame-retardant and heat-insulating functions, which are not easy to hurt the hands of personnel when working at high temperatures. The alumina high-temperature resistant glue as a bonding layer can effectively bond the aerogel nanofiber felt material with the flame-retardant fabric to ensure the stability of the combination of the two. The setting of the silk lining can further improve the smoothness and comfort of the inside of the gloves, making them easy to wear comfortably;

[0028] 2. Polyethylene oxide aqueous solution is used as a spinning aid. During electrospinning, these small molecules of spinning aids become spinning carriers, and continuously adsorb small molecular clusters of nanofibers to form nanofibers. Compared with other long-chain polymers, polyethylene oxide can make the spinning sol have relatively good viscosity and conductivity. A certain viscosity can make the perfusion of the spinning sol easier during the spinning process;

[0029] 3. Soluble aluminum salts are used instead of aluminum silicate, and organic solvents are not used, which reduces environmental pollution. 3+ Dissolves in water and undergoes hydrolysis to generate Al(OH) 4- To get a lot of H + , creating an acidic environment to facilitate the continuation of subsequent reactions.

[0030] 4. Freeze drying is used for drying. The freeze drying process is highly non-destructive. The samples prepared on substrates with different doping concentrations have good morphology, optical and photoluminescence properties. Compared with other drying methods, the freeze drying method is simple, easy and pollution-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 It is a schematic diagram of the structure of the graphene flame retardant glove layer in the present invention.

[0033] Figure 2 The nanofiber aerogel precursor of the present invention has a structure in which oxalic acid is not added;

[0034] Figure 3 This is the structure of the nanofiber aerogel precursor after oxalic acid is added in the present invention.

[0035] Figure 4 This is a combustion test diagram of commercially available glass fiber aerogel in the present invention; Figure 5 It is a combustion experiment diagram of an embodiment of the present invention. In the figure, 1. glove body; 2. thermal insulation layer; 3. bonding layer; 4. silk lining. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example

[0039] First prepare aerogel nanofiber felt:

[0040] A1. Prepare nanofiber aerogel by sol-gel method. Weigh 100 parts of premixed reagents by weight. The premixed reagents are aluminum nitrate, aluminum isopropoxide, tetraethyl orthosilicate, deionized water, and anhydrous ethanol in a molar ratio of 1:2.5:1.16:60:16. During the stirring process, anhydrous oxalic acid is continuously added to adjust the pH value of the solution to 0.6. Stir evenly for 12 hours.

[0041] A2, weigh 1.5 parts of spinning aid by weight and add it to the solution obtained in step A1, and continue stirring for 4 hours to obtain a spinning sol;

[0042] A3, using electrospinning technology, spinning nanofiber precursors under the conditions of DC voltage 30kv, pump speed 9rpm, spinneret speed 40cm / min, temperature 26 degrees Celsius, and humidity 32%;

[0043] A4, placing the nanofiber precursor obtained in A3 into a crucible for calcination to obtain nanofiber aerogel;

[0044] A5, weighing 85 parts of the nanofiber aerogel prepared in step A4, and fully impregnating it with a silica sol solution with a concentration of 0.6wt%;

[0045] A6. Place the nanofiber aerogel soaked in silica sol solution into a liquid nitrogen quick freezer and freeze-dry for 35 hours;

[0046] A7. Place the freeze-dried nanofiber aerogel into a large crucible, calcine at high temperature, and press it into aerogel nanofiber felt material using a hot press.

[0047] A method for preparing graphene flame-retardant gloves, comprising the following preparation steps:

[0048] S1. Use polyamide 66 fiber to cut the fabric into a suitable shape;

[0049] S2, coating both sides of the fabric with a 10wt% graphene oxide solution, a radiation sensitizer and a 10wt% melamine solution;

[0050] S3, subjecting the treated sample to electron beam irradiation treatment in a nitrogen atmosphere to obtain a single-layer flame retardant fabric;

[0051] S4, coating a bonding layer on one side of a single-layer flame-retardant fabric;

[0052] S5, covering the aerogel nanofiber felt on the binding layer to obtain a flame retardant heat insulating fabric, standing for 48 hours to firmly bind, and then covering the aerogel nanofiber felt with a silk lining layer;

[0053] S6. Sew the flame-retardant heat-insulating fabric and the silk lining layer along the edges into the shape of gloves, then cut off the burrs and thread ends, turn the gloves inside out, and obtain a finished graphene flame-retardant glove with an aerogel nanofiber felt insulation layer.

[0054] The finished glove fabric was cut and compared with the commercially available glass fiber aerogel felt for thermal protection test. It was kept at 600℃, 800℃ and 1000℃ for 5 minutes. During this process, the cold surface temperature gradually increased and eventually tended to a thermally stable state. The test results are as follows:

[0055]

[0056] The cold surface temperature is lower than that of commercially available glass fiber felt, and the thermal insulation performance is strong in all temperature ranges.

[0057] The finished glove fabric and nylon 66 were subjected to combustion tests. The results are as follows: Figure 4 The original sample was basically damaged after burning, with serious curling and obvious molten droplets. The sample with added graphene oxide continued to burn after leaving the flame without curling, and no molten material was found in the residue.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A graphene flame-retardant glove, comprising a glove body, characterized in that: The inside of the glove body is coated with a heat-insulating layer, the glove body is made of modified polyamide 66, the heat-insulating layer is made of aerogel nanofiber felt, a bonding layer is fixedly arranged between the glove body and the heat-insulating layer, and a silk lining covering the heat-insulating layer is fixedly arranged inside the glove body.

2. The method for preparing graphene flame-retardant gloves according to claim 1, characterized in that: The method comprises the following preparation steps: S1. Use polyamide 66 fiber to cut the fabric into a suitable shape; S2, coating both sides of the fabric with a 10wt% graphene oxide solution, a radiation sensitizer and a 10wt% melamine solution; S3, subjecting the treated sample to electron beam irradiation treatment in a nitrogen atmosphere to obtain a single-layer flame retardant fabric; S4, coating a bonding layer on one side of a single-layer flame-retardant fabric; S5, covering the aerogel nanofiber felt on the binding layer to obtain a flame retardant heat insulating fabric, standing for 45-48 hours until the fabric is firmly bonded, and then covering the aerogel nanofiber felt with a silk lining layer; S6. Sew the flame-retardant heat-insulating fabric and the silk lining layer along the edges into the shape of gloves, then cut off the burrs and thread ends, turn the gloves inside out, and obtain a finished graphene flame-retardant glove with an aerogel nanofiber felt insulation layer.

3. A graphene flame-retardant glove and a preparation method thereof according to claims 1-2, characterized in that: The bonding layer is aluminum oxide high temperature resistant glue, and the radiation sensitizer is triallyl cyanurate.

4. The graphene flame-retardant glove according to claim 1, characterized in that: The aerogel nanofiber felt comprises the following preparation steps: A1. Prepare nanofiber aerogel by sol-gel method, weigh 100 parts of premixed reagents by weight, wherein the premixed reagents are aluminum nitrate, aluminum isopropoxide, tetraethyl orthosilicate, deionized water, and anhydrous ethanol in a molar ratio of 1:2.5:1.16:60:16, and continuously add anhydrous oxalic acid during stirring to adjust the pH value of the solution to 0.5-1, and stir evenly for 10h-12h; A2, weigh 1-2 parts of spinning aid by weight and add it to the solution obtained in step A1, and continue stirring for 3-4 hours to obtain a spinning sol; A3, using electrospinning technology, spinning nanofiber precursors under the conditions of DC voltage 30-35kv, pump speed 9-12rpm, spinneret speed 35-40cm / min, temperature 26-28 degrees Celsius, and humidity 32-34%; A4, placing the nanofiber precursor obtained in A3 into a crucible for calcination to obtain nanofiber aerogel; A5, weigh 80-90 parts of the nanofiber aerogel prepared in step A4, and fully immerse it in a silica sol solution with a concentration of 0.6-0.7wt%; A6. Place the nanofiber aerogel soaked in silica sol solution into a liquid nitrogen quick freezer and freeze-dry for 30-35 hours; A7. Place the freeze-dried nanofiber aerogel into a large crucible, calcine at high temperature, and press it into aerogel nanofiber felt material using a hot press.

5. The graphene flame-retardant gloves and the preparation method thereof according to claim 4, characterized in that: The spinning aid is a polyethylene oxide aqueous solution with a mass fraction of 3%-5%.

6. The graphene flame retardant gloves and the preparation method thereof according to claim 4, characterized in that: The silica sol is prepared by mixing ethyl orthosilicate, anhydrous ethanol, deionized water and acetic acid in a mass ratio of 5:20:40:2.8 for 1-1.5 hours.

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